Monolithic leenforcement



G. G. GREULICH M ONOLITH I C REENFORC EMENT Filed Nov. 19. 1930V f .Wm awww-1. i

H/.mimmmmm/N 5. .5 bank vaults, and the like.

Patented Aug. 30, 1932 AuNi'rlazD STATES PATENT oFFicE GERALD Gr. GREULICH, F CLEVELAND HEIGHTS,A OHIO, ASSIGNOR T0 THE LOCK-STEEL COMPANY, or PITTSBURGH, PENNSYLVANIA, A coRPoRATioN or DELAWARE 'MONOLITHIC EEENFORCEEIENT -This invention relates to wall, floor or ceiling constructions and 'more particularly *to burglar-proof reeniorcedwall, Hoor or ceilingV constructions, such as Yare used in An,Y ordinaryconcrete wall can bechipped 4through andbroken away quite rapidly, and therefore, in the construction of bank vaults fithas beenlcustomary toimbed metal reen- .forcing members inthe concrete slabs comprising the walls, ioors and ceilings, the re- A,enforcing members being arranged so as to make it diicult to break an opening through the wall large enough to admita man. The reenforcing material should be constructed 'd yentirelyfoif hardened tool-resisting steel, so

`that a torch rwould be necessary to cut away the metal.v However, most vprior reenforcing devices'have been fabricated by compli- .catedsproc'esses such as bending, crimping Vand `.slitting and expanding, and therefore Lonlyl parts of Such prior `devices could kbe `in the drawing, in which Fig. 1 is a horizon- `made ofhardened steel. Also, certain prior yconstructions and reenforcing devices have rbeen unsatisfactory in that it has been .pos-

sibleto remove a small section of the concrete and metal, and then to strip away large sections ofthe .metal Others have been objectionable in that they have lacked sufficient .s ostructural strengthV and have been7 easy to demolish by an explosive force.

important object olmy invention, therefore, is to provide a method of reenforcing a Slab of concrete or similar material, so as yto render it practically impossible tocut an opening therethrough suiiicient in size to admit a man without cutting thel reenforcementinto small sections.l In this connection, lmy 'invention `also contemplates a reenforc- .ing construction, which enables the parts to fbeffabricated at the factory, of hardened,

utool-resisting steel, compactly nested .for Ahipment, rand conveniently handled at the time and place of installation.

' kAn additional object of my invention is ytoprovide` a slab reenforcement, which not only has-the characteristic of increasing the cliiiiculty. of cutting an opening therethrough, but also has thecharacteristic of increasing thelresistance to demolition byexplosive force of a buildingby ii're orkotherwise.

Briefly, my invention contemplates a wall andjto'load stresses incident to the collapse prising Straight vertical end members hav# ing bent horizontal cross-iiiembers secured thereto; jThe units'are adapted to inter-nt in pairs, and when the pairsare placed in the `wall construction, a locking bar, which is adapted to be inserted through openings lformed between the cross-members of adjacent pairs of units, is employed to secure the pairs together, thus forming a continuous chain of reenforcements, no section of which VK.canjbe removed without cutting away each of the bent members, and part of the straight members. The wall may be further reen- Nforced by ylongitudinally extending horizonital rods, which may be supported by the transverse horizontal members of. the units. A preferred form of my invention isshown tal section of a concrete slab, embodying my reenforcing members; Fig. Qfisv a vertical section, taken along the lines 2-2 of Fig. 1; Fig. 3 is a perspective of two of the units l'interiitted to form a pair; Figfl is a perspective `showing pairs of units interloclred to form `a continuous reenfor'cing chain; and

VFig. 5 is an end elevation of the units nested for shipment.

Referring moreparticularly to the drawing, indicates a concrete slab embodying my burglar-.proof reenforcing construction.

Amembers 15, which extend obliquely through ,thel slab, and which may be vertically spaced apart land secured at'their ends to end Vniembers 16 and 17, by welding, brazing or any other convenient method. All of the various parts ofthe units are preferably formed ot' hardened, tool-resisting Steel.

Preferably, the cross members are bent at an acute angle, asat 18, and the straight portions extending ;troin the apex of the angle are of ,unequal length, as this construction distributes the end members throughout the n engage the angular portions 18 of the cross manner. i

the concrete. f

- e Fromthe foregoing description of apre- '.ferred formfof my invention, it will be seen mem ers, may be provided to secure adjacent pairs of units together, and the wall may be further reenforced by means ofv horizontally extending rods 20, which rest on the cross members 15.

The method of assembling the reenforcing material is clearly indicatedy in Figs. 3 ,andy

4. The vfirst step is to arrange the `units in pairs, so that the units in each palr face opposite directions. n That is, in the drawing,` the cross members extendto the right of the n end members, in the units Aformed by the vmembers 15, 16 and 17; and to` the leftl of the end members in the units formed by the vmembers 15a, 16a and 17a. n The two units are then interfitted in pairs, by moving them together, so tliat the end members 17 en age the cross members 15a, and theend mem rs :17a rest against the cross members 15..

Aften these units have been assembled gin pairs, the pairs of units are placed in the wall 1n =such manner lthat the bent portions 18 of one pair overlap the bent ortions 18a of each adjacent pair, toa su cient extentto lthrough the opening between the bent portions 18 and 18a.

To furtherreenforce the slab,the longitudinally extending members 20 may be slid in from the ends of the reenforcing construction before theconcrete is poured, and so po- ;sitioned that they rest on cross members 15.

Whenthe reenforcing material has been assembled, the concrete is poured in the usual The construction, `which I have illustrated and described, provides an interlocked reenforcement which resists stresses in every direction. This is apparent, for the straight members are arranged in substantially parallellrows and one of the rows constitutes an interlocking device, which prevents stripping of any of the forms after a small sectionl of 'the'concrete shall have been removed. The Vuse of cross-members, which extend obliquely to the rows offers resistance to a certain method of attacking a wall of this character by a wedge shapedropening, and thereby prevents stripping of largesections of the metal from that I have provided a reenforced slab construction, in which the metal reenforcing membersy are ,doubly interlocked, and in whlch the reenforcingrmaterial forms, in effect, a chain, no link or section of which can be removed without being completely destrayed.' Furthermore, it will be seen that I "haveprovided a reenforcement which may be easilyk assembled, and manufactured, and whlchV will add to the structural strength .of the yWall and prevent buckling in case of fire 2. A reenforcement for concrete and the ylikegc'omprising four rows of longitudinal vbars arranged in substantially parallel relationship, bent transverse bars rigidly vcone vnecting the longitudinal bars, each transverse i bar having a p ortiony thereof/extending to onejof vtlieou'terrows with adjacent transversemeinbers having portions thereof in Uoverla ping relation, and Y an 'intermediate row o bars connecting the adjacent sets'of y cross bars toy ether.

admit a locking bar 19, which is inserted 3. A reen orcement Vfor concrete V'and lthe like comprising a plurality of fabricated `umts each having longitudinal members and rigid transverse cross members secured thereto, said transverse members of adjacent units bein'giarranged in overlapping relation, and

means for securing the same together.

4. A reenforcement 'for concrete and the like comprising a plurality of fabricated units each having longitudinal members and rigid transverse cross members secured thereto, said transverse members of adjacent units beingy arranged in overlapping relation, and

"means engaging the transverse members kto prevent the units from being separated' laterally.

5. A reenforcement for concrete and vthe like com ising a plurality of fabricated units eaclil having longitudinal and rigid ,transverse cross members secured thereto, the ktransversemembers of adjacent units nextending laterally in 'opposite directions from the longitudinalmembers yso that they overlap Lwhen assembled, and means for locking the'cross members yin overlapped relation.

l f' 6. e A reenforcement construction for a slab r'of building material comprising a-series of 'f units each including aplurality of rigid lonkgitudinal members and transverse rigid cross members secured to said longitudinal mem- "bers,ksaid transverse members being bent intermediate their Yends to providev portions projecting to one side'of the planeof the longitudinal members, said bent ortions on adjacent vunits extending towar each other and lying in overlapped relation, and means yfor securing the units against lateral separation.

7 QA', reenforced construction yforA a slab of building material comprising a series of units each including a plurality of rigid longitudinal members and transverse rigid cross members secured to said longitudinal members, said transverse members being bent GERALD G. GREULICI-I. 

